How to get to Noi Bai International Airport?
Airport transportation: https://www.hanoiairportonline.com/..
Taxi: about 30 minutes, 320,000 VND (Mai Linh is trustworthy)
Grab: about 300,000 VND
Minibus: VND 22,000 for Vietnamese or VND 32,000-40,000 for foreigners
Public Bus: Hanoi city buses number 7 (Kim Ma bus station) and 17 (Long Bien bus station) connect Noi Bai Airport with Hanoi city center - 1 hour, 5,000 VND, every 15 minutes
Express Bus 86 (Orange color): 30,000 VND, Ticket by on-board